Ferroreenforced-concrete sleeper



Nov. 27, 1928. 1,692,933y

K. FU KAGAWA FERROREENFORCED CONCRETE SLEEPER Filed May 24, 1927 ATTORNEY Patente-cl Nov. 27, 1928.

UNITED STATES PATENT orifice.

TOKYO,

JAPAN.

FERROREENFORCED-CONCRETE SLEEPER.

Application led May 24, 1927, Serial No.

This invention relates to reenforced concrete railroad ties and has for its objectl the provision of a tie of novel and durable construction adapted to withstand the stresses and strains set up therein during the operation of railway rolling stock; My invention has as a further object the provision of novel fastening means for adj ustably securing rails to the tie, whereby rails ofE different sizesand tracks of different gaugesy may be securely appliedlto the tie.

Thus, in accordance with my invention, I may provide a tie made of concrete and suitably reenforced by metallic rods to add rigidity and strength thereto. Furthermore, my tie may be made oblong -and with dimensions similar to the present'type of wooden ties, although I desire it to be' understood that the tie may be made of any length depending upon the purposes for'which itis to bev used.

For a better understanding of my invention, reference is made te the accompanying drawings wherein.:

Fig. 1 is an elevation of a tie in accordance with the invention,

Fig. 2 is a plan view of the tie,

Fig. 3 is a longitudinal sectional view of a portion of the tie taken on the line 3-3 of Fig. 2,

Fig. 4 is a cross sectional view of the tie taken on the line 4-4 of Fig. 2, and

Fig. 5 is a plan view showing the rail seat of the tie.

Considering the invention more in detail in connection with the drawings, my tie comprises an oblong body of concrete provided with recesses 1 and seats 2 for suitable rails 3. The recesses 1 serve to lighten thetie and cheapen the construction thereof without materially weakening it. Each seat 2 of the tie is provided with a pair of longitudinally disposed slots 4, as shown in Fig. 5, one side of each slot being open t-o the recess 1 on one side of the seat. Extending longitudinally from the bottom of each slot is provided a hole 4 communicating with the recess on the opposite side of the seat from that at which the slots are located. In other wo-rds, two L-shaped spaces comprising a slot 4 and hole 4 are provided in each seat.

Within these L-shaped spaces are arranged L-shaped fastening bolts 8, one leg of each of 193,787, and in 'apan December 20, 1926.

the bolts being positioned in a slot 4 and the other-leg of each of the bolts being positioned 1n a hole 4, as shown in Fig. 3.

On each of the seats 2 between the upper ends of the bolts 8 is adapted to be mounted a rail 3, held in position by means of clamping plates 6 and nuts 9 screwed on the upper ends of the bolts 8. The other end of each of the bolts 8 is provided with nuts 9. The clamping plates 6 are of substantially Ueshaped form and are provided at the eX- tremity of their upper leg with`4 a bent shoulder 5 adapted to engage with the base'flange of the'rail, when'the plates 6 are in. position on the bolts 8.

In mounting a rail'on each of the seats',

the L shaped bolts-8 are placed in the slots4, with one legv of each extending through the holes 4. The clamping plates 6 are then placed upon the upper threaded ends of the bolts 8 and held down by nuts 9 while Anuts 9 are applied to thelower ends ofy eachrofthe bolts. Bygradually tightening thenuts-9 and 9 the rails may be securely positioned-at the desired point on the seat 2.

Because of the lateral adjustment provided by my form of tie and fastening means, it is possible to employ various sizes of rails in connection with my tie and equally possible to employ my tie in the construction of tracks of varying gauge. Particularly, is this feature of lateral adjustment of value where realignment of the rails is necessary after they have once been mounted and in use for some time. In the use of wooden ties it is necessary in such cases to remove the spikes and refasten the rail in its new position. With my form of tie it is merely necessary to tighten or loosen the nuts 9, as the case may be.

After mounting the rail upon the tie, its lateral position with respect to the tie can be accurately adjusted merely by screwing down the outer nut 9 of each seat to a greater extent when the rails are to be spread and the inner nut 9 of each seat to a greater extent when the rails are to be brought closer together. In each position of adjustment, the rails are securely held to the tie by virtue of the form of the clamping plates 6, which are adapted to engage the base iange of the rail and hold it securely in position regardless of whether the upper ends of the bolts 8 are 1i. of the bolts 8 to interlock upon the tightening of the nuts 9. rIhe rail and tie are thus held together in a most effective manner.

I claim:

l. A reeniorced concrete railroad tie coniprising a recessed body portion provided with rail seats, said seats having slots therein and passages extending from the bottoms oi' said slots through said seats.

2. A reeni'orced concrete railroad tie comi prising a recessed body portion provided with vrail seats, said seats having a slot in each side face thereof and a passage extending from the bottom ot each slot through said seats longitudinally of said tie.

3'. A reenforced concrete railroad tie comprising a recessed body portion provided with rail seats, said seats having a slot extending inwardly from each side face thereoic longitudinally ot said tie and a passage extending longitudinally of said tie from the bottom of each slot to the opposite side face of said seat.

4-.- A reenforced concrete railroad tie comprising a recessed body portion provided with rail seat-s, said seats having slots therein extending` inwardly from each side face thereof Leganes to a distance from the center of the seats less than one halt' the Width of the base liange of a rail and passages extending from the bottoms of said slots through said seats.

5. A reentorced concrete railroad tie coinprising a recessed body portion provided with rail seats, said seats havingslots therein and passages extending from .the bottoms of said slots through said seats, and fastening means disposed in each of said slots and passages and adapted to engage the side Yfaces of said seats,sand the base flange ot a rail mounted on each of said seats.

6. A reenforced concrete railroad tie 'co-mprising a recessed body portion provided with rail seats, said seats having slots therein and. passages extending' from the bottoms of said slots through said seats, L-shaped bolts seated in said slots and passages, clamping plates mounted on the ends of said bolts extending from said slots, and nuts on the ends of the bolts extending from said passages.

7. A reenforced concrete railroad tie comprising a recessed body portion provided with rail seats, said seats having a slot in each side face thereof and a passage extending from the bottom of each slot through said seat an L-shaped bolt mounted in each .slot with one leg of said bolt disposed in said slot and the-other disposed in said passage, a substantially U-shaped clamping plate received on the leg of the bolt extending from said slot,

a nut on said leg of the bolt, and a nut on the leg of the bolt extending from said passage.

In testimony whereof I aiiix my signature.

KIJIRO FUKAGAWA. 

